Answer:
x = 5
Step-by-step explanation:
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-Stylez-
Answer:

Step-by-step explanation:
Let
x -----> Hermione was earning before the pay raise
we know that

so
The linear equation that represent this problem is

Solve for x
Divide by 1.05 both sides


The answer for 2x-y=9 is
x=1/2y + 9/2
20 apples / 5 apple pies = 4
4 * 2 pounds = 8 pounds
Hope this helps!